The Rio Grande serves as the defining central feature of this geographic study, marking the international boundary between the United States of America and Estados Unidos Mexicanos. The landscape is characterized by the meandering path of the river as it flows through the borderlands of South Texas and Tamaulipas. A prominent geographic marker, Valadeces Banco Number 130, highlights the fluvial history of the region, where shifting river channels traditionally created semi-isolated land parcels along the border. This map provides a clear depiction of the frontier geography where the natural watercourse dictates the political division between two nations.
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This is the sole edition of this map. No revisions or reprints were ever made.
1949 · Mc Allen
USGS Topo · 1:250,000
1954 · McAllen
USGS Topo · 1:250,000
1956 · Garcias
USGS Topo · 1:62,500
1956 · Los Ebanos
USGS Topo · 1:62,500
1956 · Escobares
USGS Topo · 1:62,500
1957 · Mc Allen
USGS Topo · 1:250,000
1962 · McAllen
USGS Topo · 1:250,000
1965 · Rio Grande City South
USGS Topo · 1:24,000
1965 · La Grulla
USGS Topo · 1:24,000
1965 · Sullivan City
USGS Topo · 1:24,000